mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-08 20:47:44 +00:00
109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2001
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Chris Saari <saari@netscape.com>
|
|
* Bobby Holley <bobbyholley@gmail.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef _nsGIFDecoder2_h
|
|
#define _nsGIFDecoder2_h
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "Decoder.h"
|
|
#include "imgIDecoderObserver.h"
|
|
|
|
#include "GIF2.h"
|
|
|
|
namespace mozilla {
|
|
namespace image {
|
|
class RasterImage;
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// nsGIFDecoder2 Definition
|
|
|
|
class nsGIFDecoder2 : public Decoder
|
|
{
|
|
public:
|
|
|
|
nsGIFDecoder2(RasterImage &aImage, imgIDecoderObserver* aObserver);
|
|
~nsGIFDecoder2();
|
|
|
|
virtual void WriteInternal(const char* aBuffer, PRUint32 aCount);
|
|
virtual void FinishInternal();
|
|
virtual Telemetry::ID SpeedHistogram();
|
|
|
|
private:
|
|
/* These functions will be called when the decoder has a decoded row,
|
|
* frame size information, etc. */
|
|
|
|
void BeginGIF();
|
|
nsresult BeginImageFrame(PRUint16 aDepth);
|
|
void EndImageFrame();
|
|
void FlushImageData();
|
|
void FlushImageData(PRUint32 fromRow, PRUint32 rows);
|
|
|
|
nsresult GifWrite(const PRUint8 * buf, PRUint32 numbytes);
|
|
PRUint32 OutputRow();
|
|
bool DoLzw(const PRUint8 *q);
|
|
|
|
inline int ClearCode() const { return 1 << mGIFStruct.datasize; }
|
|
|
|
PRInt32 mCurrentRow;
|
|
PRInt32 mLastFlushedRow;
|
|
|
|
PRUint8 *mImageData; // Pointer to image data in either Cairo or 8bit format
|
|
PRUint32 *mColormap; // Current colormap to be used in Cairo format
|
|
PRUint32 mColormapSize;
|
|
PRUint32 mOldColor; // The old value of the transparent pixel
|
|
|
|
// The frame number of the currently-decoding frame when we're in the middle
|
|
// of decoding it, and -1 otherwise.
|
|
PRInt32 mCurrentFrame;
|
|
|
|
PRUint8 mCurrentPass;
|
|
PRUint8 mLastFlushedPass;
|
|
PRUint8 mColorMask; // Apply this to the pixel to keep within colormap
|
|
bool mGIFOpen;
|
|
bool mSawTransparency;
|
|
|
|
gif_struct mGIFStruct;
|
|
};
|
|
|
|
} // namespace image
|
|
} // namespace mozilla
|
|
|
|
#endif
|